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STMicroelectronics TSX632AIST
- Part No.:
- TSX632AIST
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TSX632AIST.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MINISO
- Quantity:
- Payment:
- Shipping:
Inventory:3,665
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Product details
Overview
TSX632AIST from STMicroelectronics is a dual-channel, rail-to-rail input/output micropower CMOS operational amplifier optimized for high-impedance sensor interfaces and automotive signal conditioning. It delivers 200 kHz gain bandwidth, 45 µA supply current per channel at 16 V, ±500 µV max input offset voltage (A-grade), and operates from 3.3 V to 16 V supply rails.
For engineers reviewing the TSX632AIST datasheet, TSX632AIST pinout, TSX632AIST application, or TSX632AIST equivalent, this device is selected for ultra-low-power analog front-ends where precision, rail-to-rail swing, and wide temperature operation (–40°C to +125°C) are critical - especially in battery-powered industrial sensors and automotive body electronics.
Technical Context
The TSX632AIST implements a CMOS input stage with 1 pA typical input bias current and 1 TΩ input resistance, enabling direct interfacing with piezoresistive, capacitive, and electrochemical sensors. Its rail-to-rail input common-mode range extends from VCC– – 0.1 V to VCC+ + 0.1 V, and output swings within 70 mV of each rail under 10 kΩ load at 25°C.
It features a stable 200 kHz gain-bandwidth product with 55° phase margin and 9 dB gain margin across supply voltages (3.3 V–16 V), supporting unity-gain stable configurations without external compensation. Input offset voltage drift is specified at 1–8 µV/°C over –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 16 V - supports direct connection to 12 V automotive batteries and 3.3 V/5 V microcontroller domains without level-shifting. |
| Quiescent Current | 45 µA per channel typ. at 16 V - enables multi-year battery life in always-on sensor nodes (e.g., tire pressure monitors). |
| Input Offset Voltage | ±500 µV max (A-grade, 25°C) - reduces DC error in precision bridge amplifiers and medical ECG front-ends. |
| Gain Bandwidth Product | 200 kHz typ. - sufficient for anti-aliasing filters, low-frequency active filtering (e.g., <100 Hz biomedical signals), and slow-loop control feedback. |
| Input Bias Current | 1 pA typ. - preserves signal integrity when amplifying nanoamp-level currents from photodiodes or pH electrodes. |
| Common-Mode Rejection | 71–85 dB (VCC = 10–16 V) - maintains accuracy in noisy environments like engine control units or factory floor instrumentation. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive use and industrial PLC analog I/O modules. |
Pinout & Package
TSX632AIST is housed in a MiniSO-8 package (3.0 mm × 3.0 mm, 1.75 mm height), offering enhanced thermal performance (RthJA = 190 °C/W) and compatibility with standard SOIC-8 PCB footprints.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node accepting differential signal; supports rail-to-rail common-mode range. |
| 2 | Non-inverting Input (Channel A) | Accepts input down to VCC– – 0.1 V; enables single-supply sensor biasing schemes. |
| 3 | Output (Channel A) | Rail-to-rail output capable of sourcing/sinking ≥30 mA at 16 V - drives resistive loads directly. |
| 4 | VCC– (GND) | Power return reference; must be low-impedance for noise immunity in mixed-signal systems. |
| 5 | VCC+ | Positive supply rail; decoupling capacitor (100 nF) required within 5 mm for stability. |
| 6 | Inverting Input (Channel B) | Independent input for second signal path; identical electrical specs to Channel A. |
| 7 | Non-inverting Input (Channel B) | Enables dual-channel instrumentation (e.g., differential pair + reference buffer). |
| 8 | Output (Channel B) | Second rail-to-rail output; usable for dual-sensor readout or redundant signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 3.3 V systems - no lost headroom at supply rails. |
| Automotive qualification | AEC-Q100 Grade 1 compliant - validated for reliability in automotive body control modules and ADAS sensor hubs. |
| ESD tolerance | 4 kV HBM - withstands handling and board assembly without additional protection circuitry. |
| Low input capacitance | 5 pF - minimizes phase shift in high-frequency feedback networks and improves stability with capacitive sources. |
| High CMRR at high VCM | 69–83 dB up to VCC - ensures accuracy in high-side current sensing and single-supply transducer interfaces. |
Applications
| Industrial Signal Conditioning | Automotive Body Electronics |
|---|---|
Use Scenario: Amplifying low-level outputs from strain gauges and RTDs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with rail-to-rail output driving 12-bit SAR ADC reference buffers. Use Value: ±500 µV offset and 1 pA bias current minimize zero-point drift and loading errors in 4–20 mA loop receivers. | Use Scenario: Signal conditioning for door module window position sensors and seat occupancy detection capacitive switches. IC Role / Device Role / Timing Role: Dual-channel buffer and comparator input stage operating from 12 V battery with sleep-mode current <60 µA total. Use Value: –40°C to +125°C operation and AEC-Q100 qualification ensure robustness in unheated door cavities and hot vehicle cabins. |
| Medical Sensor Interfaces | High-Impedance Environmental Sensors |
Use Scenario: Front-end amplification for disposable ECG electrodes in portable patient monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift dual op-amp configured as differential amplifier and right-leg drive buffer. Use Value: 5 µVPP (0.1–10 Hz) input noise and rail-to-rail output maximize SNR into 3.3 V ADCs without external level-shifting. | Use Scenario: Interfacing with MEMS-based humidity and CO₂ sensors requiring nanoamp-level excitation current sourcing. IC Role / Device Role / Timing Role: Transimpedance amplifier and reference voltage follower in battery-powered air quality nodes. Use Value: 1 pA input bias current prevents sensor polarization; 45 µA/channel quiescent current extends 10-year battery life in IoT deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSX632IST | Standard grade: ±1 mV max VIO at 25°C vs. ±500 µV for TSX632AIST; otherwise identical specs. | Suitable for cost-sensitive industrial controls where 1 mV offset is acceptable. | Select TSX632IST if system-level calibration compensates for higher initial offset. |
| MCP6022-E/SN | Higher supply current (100 µA/ch), lower GBP (1 MHz), wider VCC (2.7–6.0 V only); no AEC-Q100 rating. | Limited to 5 V systems; not qualified for automotive under-hood use. | Choose MCP6022-E/SN only for non-automotive 5 V designs needing higher bandwidth. |
Compared with TSX632IST, TSX632AIST provides tighter offset performance for precision measurement; compared with MCP6022-E/SN, it offers superior automotive qualification, wider supply range, and lower power - making it the optimal choice for harsh-environment, battery-constrained dual-channel analog front-ends.
Availability
TSX632AIST is available at Aetrix Electronics and suitable for industrial signal conditioning, automotive body electronics, medical sensor interfaces, and high-impedance environmental sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TSX632AIST includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The TSX63x series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power, high-accuracy signal conditioning in resource-constrained and thermally demanding environments - emphasizing rail-to-rail operation, automotive reliability, and sensor interface optimization.
FAQ
What is the maximum capacitive load the TSX632AIST can drive without instability?
The TSX632AIST remains stable with ≤100 pF capacitive load when using a 100 kΩ feedback resistor and proper PCB layout. For loads >100 pF, an isolation resistor (RISO) of 10–100 Ω in series with the output is recommended - per Figure 17 in the datasheet, 470 pF requires ~20 Ω RISO for stability at 16 V supply.
Does TSX632AIST support true single-supply operation with inputs at ground potential?
Yes. The input common-mode range extends to VCC– – 0.1 V (i.e., –0.1 V with respect to GND), allowing direct connection of grounded sensors or reference voltages. Output swings to within 70 mV of GND at 25°C with 10 kΩ load, satisfying true single-supply requirements for 3.3 V and 5 V systems.
How does the input offset voltage change over temperature and time?
Offset voltage drift is specified at 1–8 µV/°C over –40°C to +125°C. Long-term drift is 180 µV after 1000 hours at 125°C (extrapolated), translating to <1 µV/month in typical 25°C storage - verified per JEDEC JESD22-A117 aging methodology and documented in Section 4.4 of the datasheet.
Can TSX632AIST replace TSX632IST in existing designs without layout changes?
Yes - TSX632AIST is pin-compatible and footprint-compatible with TSX632IST in MiniSO-8. No PCB modification is needed. The A-grade version improves offset performance (±500 µV vs. ±1 mV) while maintaining identical supply current, bandwidth, and thermal characteristics - enabling drop-in enhancement of precision without redesign.
TSX632AIST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.12V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 45µA
- Current - Output / Channel:
- 92 mA
- Voltage - Supply Span (Min):
- 3.3 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MiniSO
TSX632AIST FAQ
1.How can I place an order for TSX632AIST through Aetrix?
Please submit a Request for Quotation (RFQ) for TSX632AIST on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TSX632AIST reliable?
The price and inventory of TSX632AIST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSX632AIST is usually 5 days.
3.What payment methods are accepted for TSX632AIST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSX632AIST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSX632AIST?
TSX632AIST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSX632AIST order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TSX632AIST?
For technical support, including TSX632AIST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSX632AIST requirements.
6.How does Aetrix verify that TSX632AIST is sourced from the original manufacturer or authorized distributors?
All TSX632AIST products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TSX632AIST meets industry standards.
7.What is the process for return or replacement of TSX632AIST?
All TSX632AIST units undergo pre-shipment inspection (PSI). If there is an issue with TSX632AIST, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TSX632AIST part is unused and in its original packaging.
Return procedure for TSX632AIST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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